Beilstein J. Nanotechnol.2016,7, 492–500, doi:10.3762/bjnano.7.43
micro- and nanocantilever sensors, experimental techniques that do not require contact between the sensor and a surface at some point during the calibration process are still the exception rather than the rule. We describe a noncontact method using a microfluidicforcetool that produces accurate forces
and demonstrate that this, in combination with a thermal noise spectrum, can provide the static flexural spring constant for cantilever sensors of different geometric shapes over a wide range of spring constant values (≈0.8–160 N/m).
Keywords: AFM; cantilever sensors; microfluidicforcetool; spring
resulting forces, the channel height could be reduced for spring constant values <1 N/m and increased for cantilevers with spring constants >100 N/m.
Microfluidicforcetool
In the current experiments the specific alignment of the cantilevers relative to the channel exit was chosen for reasons of confidence
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Figure 1:
Schematic side view of the microchannel with Poiseuille profile of the fluid and a cantilever that ...